Nut-lock.



PATENTED JAN. 10, 1905.

O. D. CAMPBELL.

NUT LOCK.

APPLIOATION FILED OUT. 9. 1903 (Yazzde J WWW,

/ N VE/V T09 A TTORNE Y8 Patented January 10, 1905.

PATENT OFFICE.

CLAUDE DAVID CAMPBELL, OF MARR, OHIO.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 779,766, dated January10, 1905.

Application filed October 9, 1903. Serial No. 176,376.

To all whom it may concern.-

Be it known that I, CLAUDE DAVID CAMP- BELL, a citizen of the UnitedStates, and a resident of Marr, in the county of Monroe and State ofOhio, have invented a new and 1mproved Nut-Lock, of which the followingis a full, clear, and exact description.

The object of this invention is to provide a nut-lock of novelconstruction which may be applied upon any nut to hold it stati'onary ata desired point on a screw-threaded bolt, avoid injuring the nut orbolt, be adapted for release, if this is desired, and be extremelysimple, durable, and inexpensive.

This invention consists in the novel construction and combination ofparts, as is hereinafter described, and defined in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a perspective view of a bolt and a nut secured thereon byapplication of the improvement. Fig. 2 is a transverse sectional view ofa nut, a portion of a screw-threaded bolt whereon the nut is screwed,and a side View of the improved nut-lock applied to the nut and bolt,the means for holding the nutlock in place being incomplete. Fig. 3 is asimilar view to Fig. 2, but showing the nutlock held in the nut andengaging the thread of the bolt; and Fig. 4 is a detached perspectiveview of the improved nut-lock.

formed of steel, the body of the rod having a suitable length anddiameter that correspond with the dimensions of the bolt and nut withwhich the locking device is to have engagement. One end of the body 7 istapered to give it chisel form, as shown in Fig. 4 at b,

and at the opposite end a kerf c is formed transversely therein.

To adapt the nut-such, for example, as the nut 6to receive the nut-lockbody 7, the nut is perforated through one side to intersect the threadedbore of the nut at a right angle to its axis, as shown at d in Figs. 2and 3. The outer end of the perforation d is counterbored to enlarge itfor a short distance from the exterior surface of the side of the nutwherein the perforation is made, and, as indicated in Figs. 2 and 3,this counterbore cl is widened toward the bottom thereof by undercuttingthe side wall.

In applying the device for the secure retention ofthe nut 6 at a desiredpoint on the bolt 5 a screw-driver is inserted into the kerf 0 after thenut-lock body 7has been fully inserted within the perforation (Z, andthe implement is manipulated to dispose the chisel edge of the inner endof the rod 7 across the thread of the bolt 5, as represented in Figs. 2and 3.

The upper end of the nut-lock body is positioned nearly level with thebottom of the undercut counterbore d when the edgeb rests loosely on thethread of the bolt 5. A slug 8, of lead or other soft metal, is placedin the counterbore cl and may project somewhat above the surface of thenut, the dimensions of said slug, which may be spherical or have anyother suitable shape, being such that it nearly fills the cavity inwhich it is placed. The slug 8 is now struck with a hammer, so as toflatten it and cause the soft metal to spread and fill the counterbored, as shown in Fig. 3, The force of the blows given the slug 8 willcause the edge 6 of the nut-locking device to be slightly bedded in thematerial of the thread a, and thus adapt the edge portion of thenut-lock body 7 to prevent the nut from turning in either direction onthe bolt.

It will be seen that there are no projections on the nut, and thebolt-thread is not injured by the slight embedment of the nut-lock inthe same. When the nut is to be removed or otherwise altered inadjustment on the bolt, the soft-metal filling 8 must be removed by anysuitable implement and the screw-driver applied to engage the kerf 0 andgive the end Z) a partial revolution, so as to release the corners ofthe chisel-shaped end of the nut-lock from embedment in the thread ofthe bolt, whereupon the nut-lock body will fall out of the nut when thenut is turned so as to dispose the nut-lock with the kerfed endlowermost and the nut is struck a blow with a hammer. It will be seenthat the improved nut-lock is extremely simple, can be produced fromwire-rod material at a low cost, is durable, may be reused many times,and is reliable in service, being adapted for general application to allforms and sizes of nuts that need locking.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination with a threaded bolt, and a nutscrewed thereon, said nut having a perforation extending through oneside into the threaded bore thereof, of a metal pin having a transversekerf at one end, and chiselshaped at the other end, said pin fitting inthe perforation of the nut with its outer end terminating short of theouter end of said perforation and its chisel shaped end seatingtransversely on the apices of the bolt-threads, and a soft-metal slugfor closing the perforation at its outer end, said slug being adapted tobe compressed by percussion into said opening, whereby the chisel-shapedend of the pin is embedded in the bolt-thread to hold the nut fromturning thereon.

2. The combination with a threaded bolt, and a nut screwed thereon, saidnut having a perforation extending through one side into the threadedbore thereof, the perforation being enlarged at its outer end and havingthe side walls thereof undercut, of a metal pin fitting in theperforation of the nut and being of a length a little greater than thatof the smaller inner portion of the perforation, said pin having atransverse kerf in one end and a chisel-shaped opposite end seatedtransversely upon the apices of threads of the bolt by means engagedwith the kerf thereof, and a soft-metal slug that is compressed bypercussion and fills the enlarged end of the perforation in the nut, thecompression of the slug causing the chisel end of the pin to be slightlyembedded in the thread of the bolt and thus hold the nut from turning.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CLAUDE DAVID CAMPBELL.

Witnesses BERTHA MoPEoK, L. B. MARTIN.

